Answer:
D- They use the exchange rate to convert one's Country's currency to another's
Explanation:
Stop her experiment and attempt to get accurate data before continuing from the start
Answer:
As there must be twice as many lithium ions as sulphide ions, the 'numbers'
must be different.
It's 4:8. i.e. 4 sulphides around each lithium; and 8 lithiums around each
sulphur.
It's an antifluorite structure.
